Skip to main content

How Does a Diesel Generator Work?


How Does a Diesel Generator Work?

A diesel powered generator is the combination of a diesel engine and an alternator or electric generator to generate electrical energy. Here the alternator is the generator which generates the electric power and engine is used to rotate the electric generator. Diesel generators are mostly used as an emergency power supply.

1. Working Principle
Diesel Generator works in four cycles:

Suction/Intake
Compression
Power
Exhaust
The working principle of a diesel generator is based on the law of Energy conversion i.e. “Energy can neither be created nor be destroyed but be only converted from one form to another form.” Since diesel has chemical energy, during combustion the chemical energy is converted into heat and force. This force is known as mechanical energy which helps in rotating the alternator. The combustion process in a diesel engine is commenced by spontaneous ignition of the fuel when it is injected into a highly compressed charge of air which has reached approx. 750 degrees Celsius.

Suction Stroke
Here the piston moves down from the top dead centre due to which the inlet valve opens, and the air is drawn into the cylinder. After drawing enough air with pressure, the suction valve gets closed at the end of the stroke.

Compression Stroke
During this stroke, the piston moves upwards from the bottom dead centre. The air drawn into the cylinder gets trapped inside the cylinder and compressed because of the upward movement of the piston. In diesel generators, since the compression ratio used is very high, the air is compressed to a very high pressure, up to 40kg/cm squared. The temperature of the air is very high at this pressure which is enough to ignite the fuel.

Power Stroke
The fuel is injected into the hot compressed air and it starts burning and maintains the pressure. When the piston reaches the top dead centre the supply of fuel turns off. The injection of the fuel at the end of compression stroke continues till the cut-off point. Both the inlet and exhaust valve remain closed and the hot gases and compressed air now expand in the cylinder which causes the piston to move down and it finally reaches the bottom dead center.

Exhaust Stroke
During this stroke, the piston again moves upward, and the exhaust valve opens. The inlet and fuel valve are closed. Most of the burnt fuel gases escape due to their own expansion. The remaining gases are pushed out by the upward movement of the piston through the exhaust valve. At the end of this stroke, the exhaust valve closes, and the cycle is completed.



Diesel Generator Parts

The following are the main components of a Diesel Generator:

Engine
Alternator
Fuel System
Governor
Voltage Regulator
Cooling and Exhaust Systems
Lubrication System
Flywheel
Control Panel
标签：

Comments

Post a Comment

Popular posts from this blog

Diesel Generator Power Ratings: Standby vs Prime vs Continuous

Diesel generator sets are commonly used in a variety of sectors due to their dependable performance and high efficiency. They can be used for emergency power supply in the event of a power cut or used in places without connection to a power grid. When selecting a diesel generator for your home or business, you need to consider many factors, such as generator’s ratings. In this article, we’ll explain the three basic rating types - standby, prime, and continuous in diesel generators. ISO-8528-1:2018 defines basic generator set rating categories based on four operational categories: Emergency Standby Power (ESP), Prime Power (PRP), Continuous Power (COP) and Limited-Time Running Prime (LTP). Read on and learn the application of power ratings for engines used in generating sets. Standby Power Rating Standby Power(ESP) is used to supply emergency power when the external power supply is interrupted, such as power outages. Standby power rated generators can supply reliable electricity as t...
Post a Comment
Read more

How to Choose a Household Mini Generator

With the improvement of people's living standards, there are more and more household appliances, such as rice cookers, microwaves, kettles, refrigerators, air - conditioners, washing machines, etc. It can be said that every household has them. But what if there is a power outage? These appliances won't work properly, and our lives will be greatly disrupted. How can we avoid this? We can use household mini - generators to provide convenience in power consumption. So, how to choose a good household mini - generator? Consider the noise level Since it is for household use, when choosing a household mini - generator, we need to check whether the noise will affect the neighbors. Generally, the seller will demonstrate the performance of the generator in advance. A good household generator can reduce noise by about 80%. Choose a generator with a moderate price Due to different brands, there are significant differences in power, and consequently, the price differences of househ...
Post a Comment
Read more

How to Choose Efficient Diesel Generators for the Film and Television Industry?

In the film and television industry, the stability of the electricity supply during filming is crucial. Whether the equipment are the cameras or the lighting equipment on the filming site, or the post-production equipment, they all need stable and reliable power support. Unstable or interrupted power can result in interrupted filming, damage to equipment, and even affecting the progress and quality of the entire project. Therefore, investing in high-efficiency diesel generator sets has become an important measure for the film and television industry to ensure the reliable power supply for shooting. Determine the power requirements Before choosing a diesel generator set for the film and television industry, it’s necessary to figure out the total power needs, including the electricity demand of the shooting location, the total power of the electrical equipment and the time of using electricity. Also consider whether there are special needs for the generators such as low noise level and...
Post a Comment
Read more